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From: Rhonda Powers <rhondap@caldera.com>
Subject: grep Supplement for SCO UnixWare 2
Date: Tue, 15 Aug 2000 23:18:08 GMT

The following Support Level Supplement (SLS) is available for downloading 
from the "SLS" directory at ftp.caldera.com:

ptf4062a: grep Supplement 

URLs associated with this SLS are:

ftp://stage.caldera.com/SLS/ptf4062a.txt   
ftp://stage.caldera.com/SLS/ptf4062a.Z  

This SLS installs on the following platform(s):

             SCO UnixWare 2.01 - 2.1.3

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Description:

This SLS addresses the following problem:

        When the pattern file named in a "-f" option is actually a pipe,
        it is possible for the grep or egrep command to fail to read all
        of the specified patterns, that is, it might read some, all, or
        none of the data supplied via the pipe.  This may cause incorrect 
        results to be produced.  No error message is generated.

        Two examples of problematical usages would be:

            $ echo $pat | genpat | grep -f /dev/fd/0 infile 
            $ grep -f <(echo $pat | genpat) infile          # ksh only 

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